Query: NC_009785:1895679 Streptococcus gordonii str. Challis substr. CH1, complete genome Lineage: Streptococcus gordonii; Streptococcus; Streptococcaceae; Lactobacillales; Firmicutes; Bacteria General Information: Normal human oral flora. Most streptococci are facultative anaerobes, and some are obligate anaerobes. Serologic grouping is based on antigenic differences in cell wall carbohydrates, in cell wall pili-associated protein, and in the polysaccharide capsule in group B streptococci. Streptococcus gordonii is a commensal member of the human oral flora. It initiates the formation of biofilms on tooth surfaces known as dental plaque, which is strongly associated with the development of dental cavities (caries) and gum disease. It is a frequent causative agent of bacterial endocarditis (inflammation of the membrane lining the heart) which often occurs as a result of oral trauma, allowing S. gordonii to invade the bloodstream and colonize the heart.
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General Information: Streptococcus equi equi is an obligate parasitic bacterium and is the causative agent of a serious upper respiratory tract disease within members of the family Equidae (horses), called strangles. Strangles is a highly contagious disease of the nasopharynx and lymph nodes. The genome sequence of this organism will provide information into the production and regulation of virulence factors involved in this disease. Pathogenic in horses, goats and sheep. Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains. Members of this genus vary widely in pathogenic potential. Most streptococci are facultative anaerobes, and some are obligate anaerobes.